You could also see if any printer-related stuff was thrown in Applications, but again with the computer being toast these are just guesses.
Alternately, take a peak at the ZIP and see if any README's are included with uninstallation instructions. DMG files again - sometimes an uninstall is included with the installer, and it might trigger uninstallation options. A recent storm brought some lightning that fried all the computers here so there's no way for me to trial/error anything.
I'm not sure how to UN-install the drivers. In any case, you can try grabbing the correct drivers for the C8180 from HP's website and installing them - hopefully they'll take over and clear up the issues.
Jonathan: I've only installed the drivers here for the LaserJet 1600 (not the C8180), and it probably would have been better for you to simply install HP's drivers for the C8180 rather than these (you mentioned it's mac-compatible so I'm assuming HP provides drivers). Matt Gadient on Augclick here to reply paul: Glad it's working for you :)
Please leave a comment if you ran into the password issue, and whether or not the instructions in the follow-up solved it. There’s no harm in enabling the root account, although you may want to disable it once you’ve adjusted the settings for security purposes (instructions to disable it again are on the same Apple support page). Step 3 should work, but since I’m not able to try it, I can’t say for sure. Once you’ve enabled the root account, try logging into again using “root” as the username (no quotes), and the password you created for the root account. It’s 6 steps for Mac OS 10.5 (earlier versions are 12 steps). Read on Apple’s site for instructions on how to enable the root account (listed under the How to enable the root user section of that page).
Once installed, go to System Preferences, Printers, and add the printer – a driver should now be showing up similar to this:.Alternately you may want to try foo2hp instead although this has NOT BEEN TESTED. Note that for Snow Leopard (the 2nd package), hpijs is there in place of foo2zjs and it’s not listed as supporting the 1600 – some seem to have success while many do not – you may want to read through a few comments and see.
It’s worth noting there’s a terminal/text part of the install you’ll have to answer questions in (for me #2 was the LaserJet 1600). If you’re using 10.2 you’ll want to download the 10.2 files instead.